Bike lanes are typically seen as being environmentally friendly. But some Bay Area leaders say the one on the Richmond-San Rafael Bridge is causing an increase in pollution.
Should be noted that Damon Connolly (the legislator trying to shut the bike lane) was convicted for DUI hit-and-run. It says a lot about the current state of political affairs that he was elected to the Assembly as opposed to serving a jail term.
Converting the bike lane to auto lane wouldn't fix traffic anyway. Just beyond the bridge the road is only two lanes (really 1-lane as most of the traffic is getting on the 101 exit). Traffic studies by Caltrans showed that putting 3 lanes on the bridge would actually make things worse.